Articles in Scholarly Journals [Incomplete List]

1. A construction of real weight functions for certain orthogonal polynomials in two variables
   Journal of Mathematical Analysis and Applications, vol. 319, no. 2, pp. 475–493, 2006
2. Sobolev orthogonal polynomials in two variables and second order partial differential equations
   Journal of Mathematical Analysis and Applications, vol. 322, no. 2, pp. 1001–1017, 2006
3. Construction of differential operators having Bochner–Krall orthogonal polynomials as eigenfunctions?
   Journal of Mathematical Analysis and Applications, vol. 324, no. 1, pp. 285–303, 2006
4. Fourth-order Bessel equation: eigenpackets and a generalized Hankel transform
   Integral Transforms and Special Functions, vol. 17, no. 12, pp. 845–862, 2006
5. Additional spectral properties of the fourth-order Bessel-type differential equation
   Mathematische Nachrichten, vol. 278, no. 12-13, pp. 1538–1549, 2005
6. The Fourth-order Bessel-type Differential Equation
   Applicable Analysis, vol. 83, no. 4, pp. 325–362, 2004
7. On analytic sampling theory1
   Journal of Computational and Applied Mathematics, vol. 171, no. 1-2, pp. 235–246, 2004
8. The Sobolev orthogonality and spectral analysis of the Laguerre polynomials Ln-k for positive integers k1
   Journal of Computational and Applied Mathematics, vol. 171, no. 1-2, pp. 199–234, 2004
9. Legendre polynomials, Legendre–Stirling numbers, and the left-definite spectral analysis of the Legendre differential expression
   Journal of Computational and Applied Mathematics, vol. 148, no. 1, pp. 213–238, 2002
10. Journal of Computational Analysis and Applications, vol. 4, no. 4, pp. 363–387, 2002
11. A General Left-Definite Theory for Certain Self-Adjoint Operators with Applications to Differential Equations
    Journal of Differential Equations, vol. 181, no. 2, pp. 280–339, 2002
12. Orthogonal Polynomial Solutions of Spectral Type Differential Equations: Magnus' Conjecture,
    Journal of Approximation Theory, vol. 112, no. 2, pp. 189–215, 2001
13. Orthogonal polynomial solutions of linear ordinary differential equations
    Journal of Computational and Applied Mathematics, vol. 133, no. 1-2, pp. 85–109, 2001
14. Transactions of the American Mathematical Society, vol. 353, no. 09, pp. 3629–3648, 2001
15. Self-adjoint operators generated from non-Lagrangian symmetric differential equations having orthogonal polynomial eigenfunctions
    Rocky Mountain Journal of Mathematics, vol. 31, no. 3, pp. 899–937, 2001
16. The left-definite spectral theory for the classical Hermite differential equation
    Journal of Computational and Applied Mathematics, vol. 121, no. 1-2, pp. 313–330, 2000
17. H. J. S. Smith and the Fermat Two Squares Theorem
    The American Mathematical Monthly, vol. 106, no. 7, p. 652, 1999
18. An integral operator inequality with applications
    Journal of Inequalities and Applications, vol. 3, no. 3, pp. 245–266, 1999
19. Differential equations having orthogonal polynomial solutions
    Journal of Computational and Applied Mathematics, vol. 80, no. 1, pp. 1–16, 1997
20. New characterizations of classical orthogonal polynomials
    Indagationes Mathematicae, vol. 7, no. 2, pp. 199–213, 1996
21. Zeros of orthogonal polynomials in certain discrete Sobolev spaces
    Journal of Computational and Applied Mathematics, vol. 67, no. 2, pp. 309–325, 1996
22. Differential equations and Sobolev orthogonality
    Journal of Computational and Applied Mathematics, vol. 65, no. 1-3, pp. 173–180, 1995
23. The symmetric form of the Koekoeks' Laguerre type differential equation
    Journal of Computational and Applied Mathematics, vol. 57, no. 1-2, pp. 115–121, 1995
24. The Laguerre Type Operator in a Left Definite Hilbert Space
    Journal of Mathematical Analysis and Applications, vol. 192, no. 2, pp. 460–468, 1995
25. Sobolev Orthogonal Polynomials and Spectral Differential Equations
    Transactions of the American Mathematical Society, vol. 347, no. 9, p. 3629, 1995
26. On Recurrence Relations for Sobolev Orthogonal Polynomials
    SIAM Journal on Mathematical Analysis, vol. 26, no. 2, p. 446, 1995
27. SIAM Journal on Mathematical Analysis, vol. 25, no. 3, Article ID 0525054, 1994
28. Characterization of Classical Type Orthogonal Polynomials
    Proceedings of the American Mathematical Society, vol. 120, no. 2, p. 485, 1994
29. Real orthogonalizing weights for Bessel polynomials
    Journal of Computational and Applied Mathematics, vol. 49, no. 1-3, pp. 51–57, 1993
30. Orthogonal polynomials and extensions of Copson's inequality
    Journal of Computational and Applied Mathematics, vol. 48, no. 1-2, pp. 33–48, 1993
31. Orthogonal polynomials and approximation in Sobolev spaces
    Journal of Computational and Applied Mathematics, vol. 48, no. 1-2, pp. 69–90, 1993
32. Discrete Inequalities, Orthogonal Polynomials and the Spectral Theory of Difference Operators
    Proceedings of the Royal Society: Mathematical and Physical Sciences (1990-1995), vol. 437, no. 1900, pp. 355–373, 1992
33. SIAM Journal on Mathematical Analysis, vol. 23, no. 3, Article ID 0523037, 1992
34. The left-definite Legendre type boundary problem
    Constructive Approximation, vol. 7, no. 1, pp. 485–500, 1991
35. Symmetry factors for differential equations with applications to orthogonal polynomials
    Acta Mathematica Hungarica, vol. 56, no. 1-2, pp. 57–63, 1990
36. Symmetric and Symmetrisable Differential Expressions
    Proceedings of the London Mathematical Society, vol. s3-60, no. 2, pp. 344–364, 1990
37. Orthogonal polynomials and higher order singular Sturm-Liouville systems
    Acta Applicandae Mathematicae, vol. 17, no. 2, pp. 99–170, 1989
38. Distributional solutions of the hypergeometric differential equation
    Journal of Mathematical Analysis and Applications, vol. 122, no. 2, pp. 325–345, 1987
39. On the classification of differential equations having orthogonal polynomial solutions â?? II
    Annali di Matematica Pura ed Applicata, vol. 149, no. 1, pp. 77–102, 1987
40. On the classification of differential equations having orthogonal polynomial solutions
    Annali di Matematica Pura ed Applicata, vol. 138, no. 1, pp. 35–53, 1984
41. Symmetry Factors for Differential Equations
    The American Mathematical Monthly, vol. 90, no. 7, p. 462, 1983